The University of Southampton
University of Southampton Institutional Repository

FERMI/LAT observations of LS 5039

FERMI/LAT observations of LS 5039
FERMI/LAT observations of LS 5039
The first results from observations of the high mass X-ray binary LS 5039 using the Fermi Gamma-ray Space Telescope data between 2008 August and 2009 June are presented. Our results indicate variability that is consistent with the binary period, with the emission being modulated with a period of 3.903 ± 0.005 days; the first detection of this modulation at GeV energies. The light curve is characterized by a broad peak around superior conjunction in agreement with inverse Compton scattering models. The spectrum is represented by a power law with an exponential cutoff, yielding an overall flux (100 MeV – 300 GeV) of 4.9 ± 0.5(stat) ± 1.8(syst) ×10?7 photon cm?2 s?1, with a cutoff at 2.1 ± 0.3(stat) ± 1.1(syst) GeV and photon index ? = 1.9 ± 0.1(stat) ± 0.3(syst). The spectrum is observed to vary with orbital phase, specifically between inferior and superior conjunction. We suggest that the presence of a cutoff in the spectrum may be indicative of magnetospheric emission similar to the emission seen in many pulsars by Fermi.
binaries, close, gamma rays, observations, stars, variables, x-rays, LS 5039
2041-8205
L56-L61
Abdo, A.A.
dfc58b09-e4a8-4877-88ae-0c766b9f4ff2
Ackermann, M.
5acd1cfd-d60f-47a5-b863-5028b35fd1e0
Ajello, M.
a867e07a-a576-4555-af24-1c9c32b45a19
Atwood, W.B.
68ebe5c2-e39a-4a89-a2ba-56f2a449b112
Axelsson, M.
6af0c7a1-220e-405b-96ac-436ff38d399f
Baldini, L.
95ba8736-772a-4a63-b496-5a81da12a129
Ballet, J.
73e9a764-aecb-467e-8cfa-9cf1649357fe
Barbiellini, G.
60cc9980-d3fc-4fa9-9644-6adec6ac7354
Bastieri, D.
4659d10f-913d-4a85-b8a8-dbca262303cc
Baughman, B.M.
b6b12dfc-9376-4cc9-9d96-92da1ce8f5a7
Bechtol, K.
196af8f4-f0d6-4e85-9d03-7259b7210b23
Bellazzini, R.
1d782c30-2f21-46ca-b559-5d31bd6b31b3
Berenji, B.
ce421aea-2678-4729-b00b-6f2ced088405
Blandford, R.D.
c7c517e8-d8a7-4455-ac2f-fbbb4c291bb8
Bloom, E.D.
80480b68-e8d9-42d8-a99e-e4fdca2d5f41
Bonamente, E.
e2d74a4b-dc95-4d12-b012-28b262a8dd41
Borgland, A.W.
a5eb5073-82e3-41c1-aa2b-5d3700308cff
Bregeon, J.
5b90cdff-568c-4b27-b4ff-6929fe4be0b8
Brez, A.
73a96d0f-1dd3-4537-b9ea-e52ab80d38a0
Brigida, M.
1d168eda-1148-46e0-b809-d4a7765ea050
Bruel, P.
7b114ad9-76e9-460e-af27-26c59a522e68
Burnett, T.H.
67f68163-9d0e-4190-b22a-e35fdfeebab6
Buson, S.
76fdb2a7-265d-4099-9f10-ae19cff13173
Caliandro, G.A.
c7ca898d-3460-4468-8788-c84d7cd8846b
Cameron, R.A.
4d013947-3400-46f2-b333-76b3f2c6d324
Caraveo, P.A.
b5030f46-cda2-4632-92e2-26d52fa71711
Casandjian, J.M.
a484de92-e7a7-4141-908f-54b4c09c0f9c
Cavazzuti, E.
38a13267-1d00-4a3c-98f6-3923bca79e55
Cecchi, C.
a74d4ae3-a980-4a65-868d-4b173cf6dea2
Çelik, Ö.
ddfca359-1563-4f2a-89e8-3b698ed19adc
Chaty, S.
88fc8f01-1c5e-438b-8d02-929d26b37ca4
Chekhtman, A.
33b454fe-a393-4ffd-97ce-69006b7a9ad6
Cheung, C.C.
491b16fa-ec8c-443f-8704-84a77673f100
Chiang, J.
e4edcf16-3a9d-4dc7-86ae-45241a001be5
Ciprini, S.
cde2f602-fd35-4d1e-91fa-9ed9cbccbfd3
Claus, R.
c014689e-904a-40c6-95c1-298aa0e1db69
Cohen-Tanugi, J.
2e5f0c7c-be8c-473d-b1ff-66b7ffc33627
Cominsky, L.R.
0aa61a50-5752-404b-a04f-22253a73e3dd
Conrad, J.
fd24b1fa-f163-4328-a0fc-654c14438dbc
Corbel, S.
b31cdd54-9e1c-4bfa-ac85-f98c627ff455
Corbet, R.
686518c3-49f8-4989-800a-cb0e424ab414
Cutini, S.
b90dba88-35ab-46a8-9962-ddda2b8abc59
Dermer, C.D.
f93d0709-aaee-4f44-ab78-8401bfa0b9d8
de Angelis, A.
77804d6e-3a58-4a44-b6b2-dcc8e63c032e
de Palma, F.
0197e6f4-bab5-40e9-8716-75a509e49d68
Digel, S.W.
0ae2cfef-17ff-4c33-81c2-d02a926e8875
do Couto e Silva, E.
d9c42936-f4d6-4447-ae84-39571ce80937
Drell, P.S.
1708f743-d9dc-48b7-8ef0-fb548ef65615
Dubois, R.
c0aa4cf8-e9b9-497c-9676-9752b3162310
Dubus, G.
5c058290-e721-4e76-9ed9-1fe57a4128e4
Dumora, D.
53a0d4be-7130-4c07-9eb0-4e7e40f0ae90
Farnier, C.
d12c1b81-6cc1-4728-b0cd-5a0c2b6d955d
Favuzzi, C.
cace0b0c-f549-4ec0-a87d-8bafb8515fdb
Fegan, S.J.
0ba65059-85bf-4d7a-9629-ec2a447a9a4f
Focke, W.B.
bcb04836-b910-47b2-af1e-9850327b63c1
Fortin, P.
a48245c2-ffd6-4b4e-a82a-f4b4dc291368
Frailis, M.
5bd1fb69-3553-45f8-b49a-c1cd203b3bba
Fukazawa, Y.
17f137b8-30fa-4ed3-8f0e-6b524225cd53
Funk, S.
3a87aaf3-d3e9-4204-b68a-5d8b634a9a82
Fusco, P.
13c9b1ca-dbc3-4dcb-8b61-11feb98a6695
Gargano, F.
1a958cfc-9246-406d-a343-77612721873a
Gasparrini, D.
2f7b9aa5-a2fa-4f09-ba0c-44e7e11d1a9a
Gehrels, N.
4f9b1856-893c-41a0-89a0-ba9e25aacf65
Germani, S.
e30925b7-676e-4bb4-80e0-15c1955a9263
Giebels, B.
8766f903-c58a-4b16-ad0b-10a526183798
Giglietto, N.
48cdcfc3-b4cf-4c2b-9025-b4cf4075a581
Giordano, F.
b826cea9-75ca-4e41-89ac-5bd01b2d1bbb
Glanzman, T.
2a7edfe2-8b20-4d37-80c6-1c83103b33c4
Godfrey, G.
5dd5cdb8-f784-43f6-bf5d-a4134ac31731
Grenier, I.A.
05660bae-972b-4e12-8c4f-b38f37228a50
Grondin, M.-H.
c80386ca-17ec-42ed-bb36-a6e8c6fd5d1d
Grove, J.E.
065a4f16-2b63-4b67-92bd-6b1aaec2d42a
Guillemot, L.
0edf98b9-454c-4223-9fe3-e1c249dc2a4c
Guiriec, S.
6572c4fb-90e9-47d0-9644-e94621b4ba42
Hanabata, Y.
e324cc58-82d5-4ff7-b849-11d9e707676e
Harding, A.K.
22e1763d-d5cc-45a3-8194-1d8c63966709
Hayashida, M.
da01f511-ed84-4d9a-8cc5-ff7aae6681e7
Hays, E.
bcadf285-b3e4-4638-a083-19b5f73c9be5
Hill, A.B.
b1007941-b5b1-47cd-8476-7c6b9c57f347
Horan, D.
b2946e0b-a81e-40fd-ba2a-3060dec857c2
Hughes, R.E.
bbc5f4df-9b3d-4db0-8899-87a7019e8a47
Jackson, M.S.
fb309c89-0b3a-490e-b198-ac140fa5e34b
Jóhannesson, G.
76c16f2d-c7ee-4a3c-9199-3170efd8c658
Johnson, A.S.
5e3bc254-afe6-45ea-8a7f-2d492f0ffb91
Johnson, T.J.
3f31881f-3543-490d-9594-d3b367c4dcb2
Johnson, W.N.
fda405f0-a3af-434f-aa93-f251dec44150
Kamae, T.
7be9b3c7-2769-4aa4-901f-3cac3db93ad6
Katagiri, H.
1a9999b3-c6a9-4e76-b7b4-e7f628634d6e
Kataoka, J.
3df91fb4-2bbb-4982-9e71-d5e40a272358
Kawai, N.
ea33fafb-5071-4c23-beb9-c2b383c2d3c9
Kerr, M.
86f31459-0cab-493f-a861-b93d7a396863
Knödlseder, J.
d538437a-f220-4bf9-9473-9530d3cbddcf
Kocian, M.L.
9bb79d1e-053c-4ad2-ba9d-93f2accdd6d9
Kuehn, F.
b4b13b3d-2801-4505-b691-9cfecded9cf3
Kuss, M.
b6afd7a6-ef08-42fc-8e85-c128abf33800
Lande, J.
ba928659-a5d2-41a6-a015-5cc2fcca9782
Larsson, S.
8617c357-72b2-4c59-b5cb-63cb96a235b9
Latronico, L.
0b9c9e85-42b1-464a-9aa1-bdd081a1cdfc
Lemoine-Goumard, M.
6792ddc4-5ae6-4894-95a5-89e4d1f6c54b
Longo, F.
0ea9ac7a-ab81-41ee-bd72-144e2ede76ba
Loparco, F.
287c556b-37f9-4cfa-867d-824cc2cc794c
Lott, B.
ae4fd8e3-c552-496b-abf7-04a1be6f1ff3
Lovellette, M.N.
929fffe6-b5b0-44e9-a818-3bba42751748
Lubrano, P.
8356e014-b0f6-401f-9f85-42b63706fb77
Madejski, G.M.
582a5992-d398-4d35-845e-7da273647c19
Makeev, A.
e40d1291-3f47-43aa-a0a5-745d810b43f6
Marelli, M.
614654fb-6f81-4f09-93b7-73c9bbe25fd4
Mazziotta, M.N.
9df63c06-a2de-4fc0-a575-75a6dab00720
McEnery, J.E.
6c9f7a97-5d0d-453d-93db-f4c6c5842d01
Meurer, C.
9b61ce2a-0f02-4c51-92e3-9c198640058a
Michelson, P.F.
829031f1-1c02-4334-8b90-179cfe566cf9
Mitthumsiri, W.
6a16b15a-5c59-47de-8e85-4c26a8088918
Mizuno, T.
5ec0ff74-2e2f-4d09-ba24-eb13086aa5c6
Moiseev, A.A.
d59a422e-71cc-4970-bc24-73fe68d4c03f
Monte, C.
00890311-3ef5-4625-a6e2-2bcffa3dda8b
Monzani, M.E.
22228cda-1723-475d-9a43-6b6e1fce04b3
Morselli, A.
c3f7bc8d-f1a3-493b-9e8c-8a26f17bd49f
Moskalenko, I.V.
2ab80ecf-a26a-47bc-b908-f5b2982d316a
Murgia, S.
7c628812-ce7e-4087-a840-acbe17e0cddb
Nolan, P.L.
97a628b0-60c1-4152-8409-55e920e52da4
Norris, J.P.
efaa4580-d484-4988-9385-5b3216b09db6
Nuss, E.
1b60bed6-0cb0-43a5-b510-b19fda9c6e0a
Ohsugi, T.
9746d3b4-50a4-413c-b879-6799ad9a5032
Omodei, N.
ace0c32e-8f97-4e1f-acb4-03b24485189d
Orlando, E.
c6644191-076d-4dcf-83c4-67d19cb8a179
Ormes, J.F.
94a8f022-30d0-42bd-8e74-7a184eaa6aa0
Ozaki, M.
21fc2684-f46e-44ef-8ac4-1dd2f2d9abc0
Paneque, D.
f802fe3b-f009-49b1-b43b-9ac11bd83ac8
Panetta, J.H.
8ee83f68-5ef9-4ed9-b8d5-60905ae65dc2
Parent, D.
f4fcd42d-322d-4bf1-928b-03e3ddea03ae
Pelassa, V.
f7d810a8-cb3d-41c7-bd62-b3c75c50cb96
Pepe, M.
5e983752-4803-43fc-b01a-c427cd775aad
Pesce-Rollins, M.
ddb6c27e-b7f7-40ca-8eae-7827b876999c
Piron, F.
11d42bff-9653-492a-ba5e-1ff69b61818e
Porter, T.A.
ab05e770-6b47-4fb0-af83-d8c361eb7af0
Rainò, S.
c0ca6e98-d9bc-4dd1-921e-4e2d5293fb22
Rando, R.
04bf0392-6fd3-4b37-ac62-82ee86e617f1
Ray, P.S.
f282d884-f048-4d5c-a20d-d7ce53fe1a37
Razzano, M.
6fb0a085-b2bd-4c2a-b9f3-393a54d6d3cb
Rea, N.
44ef6413-a9bf-499c-bb92-b2e7d335ff4b
Reimer, A.
c3929c50-4264-48de-adae-45b4c36c800f
Reimer, O.
448db9d0-0706-4bc4-a969-2a6e419e2b41
Reposeur, T.
6200db41-d032-4730-bce4-b37f4bb21d6f
Ritz, S.
e27f8402-9bec-46c3-be76-583c43fad417
Rochester, L.S.
5744302f-e396-4c73-ba67-0c30a92685c2
Rodriguez, A.Y.
e0aac3bd-d907-4824-b101-d474d0889d0e
Romani, R.W.
398c5472-d096-406e-8820-8ecef238be1c
Roth, M.
4faa0e20-ef10-4c05-985a-04a62f02a08e
Ryde, F.
48a79a0a-b9c4-4978-9b79-4e792c0766e3
Sadrozinski, H.F.-W.
7407d451-762a-496e-9831-7a8e4cf9976e
Sanchez, D.
6677b0d5-a62e-430a-b387-397b8927638c
Sander, A.
1be4ca01-5642-4ca3-b872-3b5262f0f962
Saz Parkinson, P.M.
e4b078fb-34ff-4709-b3f7-64dfb330f147
Scargle, J.D.
240868a1-6ba8-44be-b54f-e7ac15cd21da
Sgrò, C.
42d183f4-729e-4d9f-847b-36ac28be47af
Sierpowska-Bartosik, A.
e7f66f49-f7ab-42fc-9252-3d8cf6ecd4f8
Siskind, E.J.
f07d5b5a-0e4e-4e30-97c1-6e8cad738e84
Smith, D.A.
db42fec3-e0fe-4dd1-8fbc-b87328699cce
Smith, P.D.
5f720e42-d84d-4ef5-9547-eae324c2e8fa
Spandre, G.
7da66c93-d289-49fa-b9cb-8e26a28e6241
Spinelli, P.
a3e9e65d-4622-4548-86e9-4da69ba3e1b6
Strickman, M.S.
5287f536-a097-4285-b936-2519e611f610
Suson, D.J.
f59056b3-1195-42c4-8c19-016ebf92df36
Tajima, H.
89b5acb8-85d3-4484-9720-72d5fa843d67
Takahashi, H.
809c0ba2-332a-43fb-8f80-d98816d4a99f
Takahashi, T.
d49df4df-ae10-45e4-a86c-c07efb7dc889
Tanaka, T.
37d93773-3e20-434d-88f3-444ecb2ade06
Tanaka, Y.
fda60949-5883-48cd-b316-2505ffd3bcbe
Thayer, J.B.
607258ee-cbee-44f7-8bdf-e58ee7ea4cbb
Thompson, D.J.
ac2fd95d-9af1-40eb-899f-1bbbfff84670
Tibaldo, L.
517648ec-0a28-4b01-85a5-00c8c63bc466
Torres, D.F.
20b18b04-bd6f-4645-a592-07b9ce6a3f86
Tosti, G.
1e6a0ea5-8d79-4eaa-83ba-9003de3dac86
Tramacere, A.
98e6b04a-5ba3-49e8-8e66-4538e8da983f
Uchiyama, Y.
97460801-24aa-4608-aa17-e4c4fa276f60
Usher, T.L.
0758a1eb-37da-4285-adc3-6f1cb698fae2
Vasileiou, V.
ac8c6b2f-d32c-430e-a805-810f680a96f7
Venter, C.
aaf31576-d0ee-49d7-93aa-e7bc0a18f31a
Vilchez, N.
0ccc7984-7765-46cb-b8ae-a624870e4e62
Vitale, V.
a5546219-5be9-4517-a52f-afcb7615feab
Waite, A.P.
b9d63515-66ec-4c67-b9e7-b540fa07b8d9
Wallace, E.
6c612cd1-479d-4766-8b08-1aa1163042a2
Wang, P.
df957848-e6e4-45f0-ba01-2d966a30aa67
Winer, B.L.
f45c008c-ad33-483d-9169-b3e859de392e
Wood, K.S.
1def310b-8704-4b6a-b357-e863b64ef7c6
Ylinen, T.
f1688a08-264a-4e8a-a0f2-94673371e863
Ziegler, M.
803ba330-20ad-426a-9f0d-c3164f927812
Abdo, A.A.
dfc58b09-e4a8-4877-88ae-0c766b9f4ff2
Ackermann, M.
5acd1cfd-d60f-47a5-b863-5028b35fd1e0
Ajello, M.
a867e07a-a576-4555-af24-1c9c32b45a19
Atwood, W.B.
68ebe5c2-e39a-4a89-a2ba-56f2a449b112
Axelsson, M.
6af0c7a1-220e-405b-96ac-436ff38d399f
Baldini, L.
95ba8736-772a-4a63-b496-5a81da12a129
Ballet, J.
73e9a764-aecb-467e-8cfa-9cf1649357fe
Barbiellini, G.
60cc9980-d3fc-4fa9-9644-6adec6ac7354
Bastieri, D.
4659d10f-913d-4a85-b8a8-dbca262303cc
Baughman, B.M.
b6b12dfc-9376-4cc9-9d96-92da1ce8f5a7
Bechtol, K.
196af8f4-f0d6-4e85-9d03-7259b7210b23
Bellazzini, R.
1d782c30-2f21-46ca-b559-5d31bd6b31b3
Berenji, B.
ce421aea-2678-4729-b00b-6f2ced088405
Blandford, R.D.
c7c517e8-d8a7-4455-ac2f-fbbb4c291bb8
Bloom, E.D.
80480b68-e8d9-42d8-a99e-e4fdca2d5f41
Bonamente, E.
e2d74a4b-dc95-4d12-b012-28b262a8dd41
Borgland, A.W.
a5eb5073-82e3-41c1-aa2b-5d3700308cff
Bregeon, J.
5b90cdff-568c-4b27-b4ff-6929fe4be0b8
Brez, A.
73a96d0f-1dd3-4537-b9ea-e52ab80d38a0
Brigida, M.
1d168eda-1148-46e0-b809-d4a7765ea050
Bruel, P.
7b114ad9-76e9-460e-af27-26c59a522e68
Burnett, T.H.
67f68163-9d0e-4190-b22a-e35fdfeebab6
Buson, S.
76fdb2a7-265d-4099-9f10-ae19cff13173
Caliandro, G.A.
c7ca898d-3460-4468-8788-c84d7cd8846b
Cameron, R.A.
4d013947-3400-46f2-b333-76b3f2c6d324
Caraveo, P.A.
b5030f46-cda2-4632-92e2-26d52fa71711
Casandjian, J.M.
a484de92-e7a7-4141-908f-54b4c09c0f9c
Cavazzuti, E.
38a13267-1d00-4a3c-98f6-3923bca79e55
Cecchi, C.
a74d4ae3-a980-4a65-868d-4b173cf6dea2
Çelik, Ö.
ddfca359-1563-4f2a-89e8-3b698ed19adc
Chaty, S.
88fc8f01-1c5e-438b-8d02-929d26b37ca4
Chekhtman, A.
33b454fe-a393-4ffd-97ce-69006b7a9ad6
Cheung, C.C.
491b16fa-ec8c-443f-8704-84a77673f100
Chiang, J.
e4edcf16-3a9d-4dc7-86ae-45241a001be5
Ciprini, S.
cde2f602-fd35-4d1e-91fa-9ed9cbccbfd3
Claus, R.
c014689e-904a-40c6-95c1-298aa0e1db69
Cohen-Tanugi, J.
2e5f0c7c-be8c-473d-b1ff-66b7ffc33627
Cominsky, L.R.
0aa61a50-5752-404b-a04f-22253a73e3dd
Conrad, J.
fd24b1fa-f163-4328-a0fc-654c14438dbc
Corbel, S.
b31cdd54-9e1c-4bfa-ac85-f98c627ff455
Corbet, R.
686518c3-49f8-4989-800a-cb0e424ab414
Cutini, S.
b90dba88-35ab-46a8-9962-ddda2b8abc59
Dermer, C.D.
f93d0709-aaee-4f44-ab78-8401bfa0b9d8
de Angelis, A.
77804d6e-3a58-4a44-b6b2-dcc8e63c032e
de Palma, F.
0197e6f4-bab5-40e9-8716-75a509e49d68
Digel, S.W.
0ae2cfef-17ff-4c33-81c2-d02a926e8875
do Couto e Silva, E.
d9c42936-f4d6-4447-ae84-39571ce80937
Drell, P.S.
1708f743-d9dc-48b7-8ef0-fb548ef65615
Dubois, R.
c0aa4cf8-e9b9-497c-9676-9752b3162310
Dubus, G.
5c058290-e721-4e76-9ed9-1fe57a4128e4
Dumora, D.
53a0d4be-7130-4c07-9eb0-4e7e40f0ae90
Farnier, C.
d12c1b81-6cc1-4728-b0cd-5a0c2b6d955d
Favuzzi, C.
cace0b0c-f549-4ec0-a87d-8bafb8515fdb
Fegan, S.J.
0ba65059-85bf-4d7a-9629-ec2a447a9a4f
Focke, W.B.
bcb04836-b910-47b2-af1e-9850327b63c1
Fortin, P.
a48245c2-ffd6-4b4e-a82a-f4b4dc291368
Frailis, M.
5bd1fb69-3553-45f8-b49a-c1cd203b3bba
Fukazawa, Y.
17f137b8-30fa-4ed3-8f0e-6b524225cd53
Funk, S.
3a87aaf3-d3e9-4204-b68a-5d8b634a9a82
Fusco, P.
13c9b1ca-dbc3-4dcb-8b61-11feb98a6695
Gargano, F.
1a958cfc-9246-406d-a343-77612721873a
Gasparrini, D.
2f7b9aa5-a2fa-4f09-ba0c-44e7e11d1a9a
Gehrels, N.
4f9b1856-893c-41a0-89a0-ba9e25aacf65
Germani, S.
e30925b7-676e-4bb4-80e0-15c1955a9263
Giebels, B.
8766f903-c58a-4b16-ad0b-10a526183798
Giglietto, N.
48cdcfc3-b4cf-4c2b-9025-b4cf4075a581
Giordano, F.
b826cea9-75ca-4e41-89ac-5bd01b2d1bbb
Glanzman, T.
2a7edfe2-8b20-4d37-80c6-1c83103b33c4
Godfrey, G.
5dd5cdb8-f784-43f6-bf5d-a4134ac31731
Grenier, I.A.
05660bae-972b-4e12-8c4f-b38f37228a50
Grondin, M.-H.
c80386ca-17ec-42ed-bb36-a6e8c6fd5d1d
Grove, J.E.
065a4f16-2b63-4b67-92bd-6b1aaec2d42a
Guillemot, L.
0edf98b9-454c-4223-9fe3-e1c249dc2a4c
Guiriec, S.
6572c4fb-90e9-47d0-9644-e94621b4ba42
Hanabata, Y.
e324cc58-82d5-4ff7-b849-11d9e707676e
Harding, A.K.
22e1763d-d5cc-45a3-8194-1d8c63966709
Hayashida, M.
da01f511-ed84-4d9a-8cc5-ff7aae6681e7
Hays, E.
bcadf285-b3e4-4638-a083-19b5f73c9be5
Hill, A.B.
b1007941-b5b1-47cd-8476-7c6b9c57f347
Horan, D.
b2946e0b-a81e-40fd-ba2a-3060dec857c2
Hughes, R.E.
bbc5f4df-9b3d-4db0-8899-87a7019e8a47
Jackson, M.S.
fb309c89-0b3a-490e-b198-ac140fa5e34b
Jóhannesson, G.
76c16f2d-c7ee-4a3c-9199-3170efd8c658
Johnson, A.S.
5e3bc254-afe6-45ea-8a7f-2d492f0ffb91
Johnson, T.J.
3f31881f-3543-490d-9594-d3b367c4dcb2
Johnson, W.N.
fda405f0-a3af-434f-aa93-f251dec44150
Kamae, T.
7be9b3c7-2769-4aa4-901f-3cac3db93ad6
Katagiri, H.
1a9999b3-c6a9-4e76-b7b4-e7f628634d6e
Kataoka, J.
3df91fb4-2bbb-4982-9e71-d5e40a272358
Kawai, N.
ea33fafb-5071-4c23-beb9-c2b383c2d3c9
Kerr, M.
86f31459-0cab-493f-a861-b93d7a396863
Knödlseder, J.
d538437a-f220-4bf9-9473-9530d3cbddcf
Kocian, M.L.
9bb79d1e-053c-4ad2-ba9d-93f2accdd6d9
Kuehn, F.
b4b13b3d-2801-4505-b691-9cfecded9cf3
Kuss, M.
b6afd7a6-ef08-42fc-8e85-c128abf33800
Lande, J.
ba928659-a5d2-41a6-a015-5cc2fcca9782
Larsson, S.
8617c357-72b2-4c59-b5cb-63cb96a235b9
Latronico, L.
0b9c9e85-42b1-464a-9aa1-bdd081a1cdfc
Lemoine-Goumard, M.
6792ddc4-5ae6-4894-95a5-89e4d1f6c54b
Longo, F.
0ea9ac7a-ab81-41ee-bd72-144e2ede76ba
Loparco, F.
287c556b-37f9-4cfa-867d-824cc2cc794c
Lott, B.
ae4fd8e3-c552-496b-abf7-04a1be6f1ff3
Lovellette, M.N.
929fffe6-b5b0-44e9-a818-3bba42751748
Lubrano, P.
8356e014-b0f6-401f-9f85-42b63706fb77
Madejski, G.M.
582a5992-d398-4d35-845e-7da273647c19
Makeev, A.
e40d1291-3f47-43aa-a0a5-745d810b43f6
Marelli, M.
614654fb-6f81-4f09-93b7-73c9bbe25fd4
Mazziotta, M.N.
9df63c06-a2de-4fc0-a575-75a6dab00720
McEnery, J.E.
6c9f7a97-5d0d-453d-93db-f4c6c5842d01
Meurer, C.
9b61ce2a-0f02-4c51-92e3-9c198640058a
Michelson, P.F.
829031f1-1c02-4334-8b90-179cfe566cf9
Mitthumsiri, W.
6a16b15a-5c59-47de-8e85-4c26a8088918
Mizuno, T.
5ec0ff74-2e2f-4d09-ba24-eb13086aa5c6
Moiseev, A.A.
d59a422e-71cc-4970-bc24-73fe68d4c03f
Monte, C.
00890311-3ef5-4625-a6e2-2bcffa3dda8b
Monzani, M.E.
22228cda-1723-475d-9a43-6b6e1fce04b3
Morselli, A.
c3f7bc8d-f1a3-493b-9e8c-8a26f17bd49f
Moskalenko, I.V.
2ab80ecf-a26a-47bc-b908-f5b2982d316a
Murgia, S.
7c628812-ce7e-4087-a840-acbe17e0cddb
Nolan, P.L.
97a628b0-60c1-4152-8409-55e920e52da4
Norris, J.P.
efaa4580-d484-4988-9385-5b3216b09db6
Nuss, E.
1b60bed6-0cb0-43a5-b510-b19fda9c6e0a
Ohsugi, T.
9746d3b4-50a4-413c-b879-6799ad9a5032
Omodei, N.
ace0c32e-8f97-4e1f-acb4-03b24485189d
Orlando, E.
c6644191-076d-4dcf-83c4-67d19cb8a179
Ormes, J.F.
94a8f022-30d0-42bd-8e74-7a184eaa6aa0
Ozaki, M.
21fc2684-f46e-44ef-8ac4-1dd2f2d9abc0
Paneque, D.
f802fe3b-f009-49b1-b43b-9ac11bd83ac8
Panetta, J.H.
8ee83f68-5ef9-4ed9-b8d5-60905ae65dc2
Parent, D.
f4fcd42d-322d-4bf1-928b-03e3ddea03ae
Pelassa, V.
f7d810a8-cb3d-41c7-bd62-b3c75c50cb96
Pepe, M.
5e983752-4803-43fc-b01a-c427cd775aad
Pesce-Rollins, M.
ddb6c27e-b7f7-40ca-8eae-7827b876999c
Piron, F.
11d42bff-9653-492a-ba5e-1ff69b61818e
Porter, T.A.
ab05e770-6b47-4fb0-af83-d8c361eb7af0
Rainò, S.
c0ca6e98-d9bc-4dd1-921e-4e2d5293fb22
Rando, R.
04bf0392-6fd3-4b37-ac62-82ee86e617f1
Ray, P.S.
f282d884-f048-4d5c-a20d-d7ce53fe1a37
Razzano, M.
6fb0a085-b2bd-4c2a-b9f3-393a54d6d3cb
Rea, N.
44ef6413-a9bf-499c-bb92-b2e7d335ff4b
Reimer, A.
c3929c50-4264-48de-adae-45b4c36c800f
Reimer, O.
448db9d0-0706-4bc4-a969-2a6e419e2b41
Reposeur, T.
6200db41-d032-4730-bce4-b37f4bb21d6f
Ritz, S.
e27f8402-9bec-46c3-be76-583c43fad417
Rochester, L.S.
5744302f-e396-4c73-ba67-0c30a92685c2
Rodriguez, A.Y.
e0aac3bd-d907-4824-b101-d474d0889d0e
Romani, R.W.
398c5472-d096-406e-8820-8ecef238be1c
Roth, M.
4faa0e20-ef10-4c05-985a-04a62f02a08e
Ryde, F.
48a79a0a-b9c4-4978-9b79-4e792c0766e3
Sadrozinski, H.F.-W.
7407d451-762a-496e-9831-7a8e4cf9976e
Sanchez, D.
6677b0d5-a62e-430a-b387-397b8927638c
Sander, A.
1be4ca01-5642-4ca3-b872-3b5262f0f962
Saz Parkinson, P.M.
e4b078fb-34ff-4709-b3f7-64dfb330f147
Scargle, J.D.
240868a1-6ba8-44be-b54f-e7ac15cd21da
Sgrò, C.
42d183f4-729e-4d9f-847b-36ac28be47af
Sierpowska-Bartosik, A.
e7f66f49-f7ab-42fc-9252-3d8cf6ecd4f8
Siskind, E.J.
f07d5b5a-0e4e-4e30-97c1-6e8cad738e84
Smith, D.A.
db42fec3-e0fe-4dd1-8fbc-b87328699cce
Smith, P.D.
5f720e42-d84d-4ef5-9547-eae324c2e8fa
Spandre, G.
7da66c93-d289-49fa-b9cb-8e26a28e6241
Spinelli, P.
a3e9e65d-4622-4548-86e9-4da69ba3e1b6
Strickman, M.S.
5287f536-a097-4285-b936-2519e611f610
Suson, D.J.
f59056b3-1195-42c4-8c19-016ebf92df36
Tajima, H.
89b5acb8-85d3-4484-9720-72d5fa843d67
Takahashi, H.
809c0ba2-332a-43fb-8f80-d98816d4a99f
Takahashi, T.
d49df4df-ae10-45e4-a86c-c07efb7dc889
Tanaka, T.
37d93773-3e20-434d-88f3-444ecb2ade06
Tanaka, Y.
fda60949-5883-48cd-b316-2505ffd3bcbe
Thayer, J.B.
607258ee-cbee-44f7-8bdf-e58ee7ea4cbb
Thompson, D.J.
ac2fd95d-9af1-40eb-899f-1bbbfff84670
Tibaldo, L.
517648ec-0a28-4b01-85a5-00c8c63bc466
Torres, D.F.
20b18b04-bd6f-4645-a592-07b9ce6a3f86
Tosti, G.
1e6a0ea5-8d79-4eaa-83ba-9003de3dac86
Tramacere, A.
98e6b04a-5ba3-49e8-8e66-4538e8da983f
Uchiyama, Y.
97460801-24aa-4608-aa17-e4c4fa276f60
Usher, T.L.
0758a1eb-37da-4285-adc3-6f1cb698fae2
Vasileiou, V.
ac8c6b2f-d32c-430e-a805-810f680a96f7
Venter, C.
aaf31576-d0ee-49d7-93aa-e7bc0a18f31a
Vilchez, N.
0ccc7984-7765-46cb-b8ae-a624870e4e62
Vitale, V.
a5546219-5be9-4517-a52f-afcb7615feab
Waite, A.P.
b9d63515-66ec-4c67-b9e7-b540fa07b8d9
Wallace, E.
6c612cd1-479d-4766-8b08-1aa1163042a2
Wang, P.
df957848-e6e4-45f0-ba01-2d966a30aa67
Winer, B.L.
f45c008c-ad33-483d-9169-b3e859de392e
Wood, K.S.
1def310b-8704-4b6a-b357-e863b64ef7c6
Ylinen, T.
f1688a08-264a-4e8a-a0f2-94673371e863
Ziegler, M.
803ba330-20ad-426a-9f0d-c3164f927812

Abdo, A.A., Ackermann, M., Ajello, M., Atwood, W.B., Axelsson, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Baughman, B.M., Bechtol, K., Bellazzini, R., Berenji, B., Blandford, R.D., Bloom, E.D., Bonamente, E., Borgland, A.W., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Burnett, T.H., Buson, S., Caliandro, G.A., Cameron, R.A., Caraveo, P.A., Casandjian, J.M., Cavazzuti, E., Cecchi, C., Çelik, Ö., Chaty, S., Chekhtman, A., Cheung, C.C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Cominsky, L.R., Conrad, J., Corbel, S., Corbet, R., Cutini, S., Dermer, C.D., de Angelis, A., de Palma, F., Digel, S.W., do Couto e Silva, E., Drell, P.S., Dubois, R., Dubus, G., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S.J., Focke, W.B., Fortin, P., Frailis, M., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Glanzman, T., Godfrey, G., Grenier, I.A., Grondin, M.-H., Grove, J.E., Guillemot, L., Guiriec, S., Hanabata, Y., Harding, A.K., Hayashida, M., Hays, E., Hill, A.B., Horan, D., Hughes, R.E., Jackson, M.S., Jóhannesson, G., Johnson, A.S., Johnson, T.J., Johnson, W.N., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kerr, M., Knödlseder, J., Kocian, M.L., Kuehn, F., Kuss, M., Lande, J., Larsson, S., Latronico, L., Lemoine-Goumard, M., Longo, F., Loparco, F., Lott, B., Lovellette, M.N., Lubrano, P., Madejski, G.M., Makeev, A., Marelli, M., Mazziotta, M.N., McEnery, J.E., Meurer, C., Michelson, P.F., Mitthumsiri, W., Mizuno, T., Moiseev, A.A., Monte, C., Monzani, M.E., Morselli, A., Moskalenko, I.V., Murgia, S., Nolan, P.L., Norris, J.P., Nuss, E., Ohsugi, T., Omodei, N., Orlando, E., Ormes, J.F., Ozaki, M., Paneque, D., Panetta, J.H., Parent, D., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T.A., Rainò, S., Rando, R., Ray, P.S., Razzano, M., Rea, N., Reimer, A., Reimer, O., Reposeur, T., Ritz, S., Rochester, L.S., Rodriguez, A.Y., Romani, R.W., Roth, M., Ryde, F., Sadrozinski, H.F.-W., Sanchez, D., Sander, A., Saz Parkinson, P.M., Scargle, J.D., Sgrò, C., Sierpowska-Bartosik, A., Siskind, E.J., Smith, D.A., Smith, P.D., Spandre, G., Spinelli, P., Strickman, M.S., Suson, D.J., Tajima, H., Takahashi, H., Takahashi, T., Tanaka, T., Tanaka, Y., Thayer, J.B., Thompson, D.J., Tibaldo, L., Torres, D.F., Tosti, G., Tramacere, A., Uchiyama, Y., Usher, T.L., Vasileiou, V., Venter, C., Vilchez, N., Vitale, V., Waite, A.P., Wallace, E., Wang, P., Winer, B.L., Wood, K.S., Ylinen, T. and Ziegler, M. (2009) FERMI/LAT observations of LS 5039. The Astrophysical Journal Letters, 706 (1), L56-L61. (doi:10.1088/0004-637X/706/1/L56).

Record type: Article

Abstract

The first results from observations of the high mass X-ray binary LS 5039 using the Fermi Gamma-ray Space Telescope data between 2008 August and 2009 June are presented. Our results indicate variability that is consistent with the binary period, with the emission being modulated with a period of 3.903 ± 0.005 days; the first detection of this modulation at GeV energies. The light curve is characterized by a broad peak around superior conjunction in agreement with inverse Compton scattering models. The spectrum is represented by a power law with an exponential cutoff, yielding an overall flux (100 MeV – 300 GeV) of 4.9 ± 0.5(stat) ± 1.8(syst) ×10?7 photon cm?2 s?1, with a cutoff at 2.1 ± 0.3(stat) ± 1.1(syst) GeV and photon index ? = 1.9 ± 0.1(stat) ± 0.3(syst). The spectrum is observed to vary with orbital phase, specifically between inferior and superior conjunction. We suggest that the presence of a cutoff in the spectrum may be indicative of magnetospheric emission similar to the emission seen in many pulsars by Fermi.

Full text not available from this repository.

More information

Published date: 30 October 2009
Keywords: binaries, close, gamma rays, observations, stars, variables, x-rays, LS 5039
Organisations: Astronomy Group

Identifiers

Local EPrints ID: 336983
URI: https://eprints.soton.ac.uk/id/eprint/336983
ISSN: 2041-8205
PURE UUID: 9114b80e-188e-4712-81cb-bbae1540b392
ORCID for A.B. Hill: ORCID iD orcid.org/0000-0003-3470-4834

Catalogue record

Date deposited: 13 Apr 2012 15:08
Last modified: 12 Nov 2019 01:49

Export record

Altmetrics

Contributors

Author: A.A. Abdo
Author: M. Ackermann
Author: M. Ajello
Author: W.B. Atwood
Author: M. Axelsson
Author: L. Baldini
Author: J. Ballet
Author: G. Barbiellini
Author: D. Bastieri
Author: B.M. Baughman
Author: K. Bechtol
Author: R. Bellazzini
Author: B. Berenji
Author: R.D. Blandford
Author: E.D. Bloom
Author: E. Bonamente
Author: A.W. Borgland
Author: J. Bregeon
Author: A. Brez
Author: M. Brigida
Author: P. Bruel
Author: T.H. Burnett
Author: S. Buson
Author: G.A. Caliandro
Author: R.A. Cameron
Author: P.A. Caraveo
Author: J.M. Casandjian
Author: E. Cavazzuti
Author: C. Cecchi
Author: Ö. Çelik
Author: S. Chaty
Author: A. Chekhtman
Author: C.C. Cheung
Author: J. Chiang
Author: S. Ciprini
Author: R. Claus
Author: J. Cohen-Tanugi
Author: L.R. Cominsky
Author: J. Conrad
Author: S. Corbel
Author: R. Corbet
Author: S. Cutini
Author: C.D. Dermer
Author: A. de Angelis
Author: F. de Palma
Author: S.W. Digel
Author: E. do Couto e Silva
Author: P.S. Drell
Author: R. Dubois
Author: G. Dubus
Author: D. Dumora
Author: C. Farnier
Author: C. Favuzzi
Author: S.J. Fegan
Author: W.B. Focke
Author: P. Fortin
Author: M. Frailis
Author: Y. Fukazawa
Author: S. Funk
Author: P. Fusco
Author: F. Gargano
Author: D. Gasparrini
Author: N. Gehrels
Author: S. Germani
Author: B. Giebels
Author: N. Giglietto
Author: F. Giordano
Author: T. Glanzman
Author: G. Godfrey
Author: I.A. Grenier
Author: M.-H. Grondin
Author: J.E. Grove
Author: L. Guillemot
Author: S. Guiriec
Author: Y. Hanabata
Author: A.K. Harding
Author: M. Hayashida
Author: E. Hays
Author: A.B. Hill ORCID iD
Author: D. Horan
Author: R.E. Hughes
Author: M.S. Jackson
Author: G. Jóhannesson
Author: A.S. Johnson
Author: T.J. Johnson
Author: W.N. Johnson
Author: T. Kamae
Author: H. Katagiri
Author: J. Kataoka
Author: N. Kawai
Author: M. Kerr
Author: J. Knödlseder
Author: M.L. Kocian
Author: F. Kuehn
Author: M. Kuss
Author: J. Lande
Author: S. Larsson
Author: L. Latronico
Author: M. Lemoine-Goumard
Author: F. Longo
Author: F. Loparco
Author: B. Lott
Author: M.N. Lovellette
Author: P. Lubrano
Author: G.M. Madejski
Author: A. Makeev
Author: M. Marelli
Author: M.N. Mazziotta
Author: J.E. McEnery
Author: C. Meurer
Author: P.F. Michelson
Author: W. Mitthumsiri
Author: T. Mizuno
Author: A.A. Moiseev
Author: C. Monte
Author: M.E. Monzani
Author: A. Morselli
Author: I.V. Moskalenko
Author: S. Murgia
Author: P.L. Nolan
Author: J.P. Norris
Author: E. Nuss
Author: T. Ohsugi
Author: N. Omodei
Author: E. Orlando
Author: J.F. Ormes
Author: M. Ozaki
Author: D. Paneque
Author: J.H. Panetta
Author: D. Parent
Author: V. Pelassa
Author: M. Pepe
Author: M. Pesce-Rollins
Author: F. Piron
Author: T.A. Porter
Author: S. Rainò
Author: R. Rando
Author: P.S. Ray
Author: M. Razzano
Author: N. Rea
Author: A. Reimer
Author: O. Reimer
Author: T. Reposeur
Author: S. Ritz
Author: L.S. Rochester
Author: A.Y. Rodriguez
Author: R.W. Romani
Author: M. Roth
Author: F. Ryde
Author: H.F.-W. Sadrozinski
Author: D. Sanchez
Author: A. Sander
Author: P.M. Saz Parkinson
Author: J.D. Scargle
Author: C. Sgrò
Author: A. Sierpowska-Bartosik
Author: E.J. Siskind
Author: D.A. Smith
Author: P.D. Smith
Author: G. Spandre
Author: P. Spinelli
Author: M.S. Strickman
Author: D.J. Suson
Author: H. Tajima
Author: H. Takahashi
Author: T. Takahashi
Author: T. Tanaka
Author: Y. Tanaka
Author: J.B. Thayer
Author: D.J. Thompson
Author: L. Tibaldo
Author: D.F. Torres
Author: G. Tosti
Author: A. Tramacere
Author: Y. Uchiyama
Author: T.L. Usher
Author: V. Vasileiou
Author: C. Venter
Author: N. Vilchez
Author: V. Vitale
Author: A.P. Waite
Author: E. Wallace
Author: P. Wang
Author: B.L. Winer
Author: K.S. Wood
Author: T. Ylinen
Author: M. Ziegler

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×